单词：iron-carbon equilibrium diagram
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By Gary Garriott Broadcast: November 3, 2003 This is Steve Ember with the VOA Special English Development Report. People have been recycling metals for hundreds of years. Today, re-using metal waste o
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US Navy Lab Turns Seawater Into Fuel 美国海军实验室成功将海水转变成燃料 For centuries, alchemists have tried to turn lead into gold. That transmutation has long been proven impossible, but another similar dream - turning water into f
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Lesson 4 Black-lead 第四课 黑铅 What is the black-lead in your pencil made of? If you take a bit of the metal which we call lead, you will find that it is grey in colour, very heavy, and not at all like the black-lead in your pencil. But the lea
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DEVELOPMENT REPORT - Recycling Scrap Metal Into MoneyBy Gary Garriott Broadcast: Monday, July 31, 2006 This is the VOA Special English Development Report. People have been recycling metals for hundred
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When it comes to sheer celestial bling, stars might not corner the market on twinkle, because beneath their rocky exteriors, some terrestrial planets may be half diamond. So said scientists at the fall meeting of the American Geophysical Union. The r
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沉湎过去,就无法与今天同行,明天因而也成了一个遥遥的无期。 沉湎过去，就无法让我们的每天过得精彩，痛苦因而成了一个咒语无法摆脱。 What is Your Recovery Rate? What is your recovery rate? How lon
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